Results 181 to 190 of about 5,505,025 (397)

Direct Access to α,β‐Unsaturated γ‐Lactams via Palladium‐Catalysed Carbonylation of Propargylic Ureas.

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract Additive carbonylations typically necessitate strong nucleophiles, such as alcohols or amines. In this study, we carbonylated a poorly nucleophilic urea, under oxidant‐free conditions. Our straightforward carbonylative strategy enables access to versatile α,β‐unsaturated γ‐lactams featuring an aminocarbonyl fragment, utilizing readily ...
Debora Schiroli, Aleksandr Voronov, Francesco Pancrazzi, Nunzio Iraci, Salvatore Vincenzo Giofrè, Beatrice Macchi, Valeria Stefanizzi, Raffaella Mancuso, Bartolo Gabriele, Paolo Pio Mazzeo, Luca Capaldo, Nicola Della Ca'   +11 more
wiley   +1 more source

CONSTRUCTION OF NUCLEAR GEOSTORAGE FACILITIES FOR PETROLEUM PRODUCTS.

, 1972
Kenn Sprague
openalex   +2 more sources

Improving the Photochemical Skeletal Enlargement of Pyridines to 1,2‐Diazepines with Isocyanates

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract In this work, we extend the one‐pot protocol to synthesize 1,2‐diazepines from commercially available and cheap starting materials. Capitalizing on isocyanate derivatives as activating agents, the photochemical skeletal enlargement occurs, while preserving key functional groups embedded in more than 30 substrates.
Clément Ghiazza, Aurélie Damond, Jérôme Marrot, Xavier Moreau   +3 more
wiley   +1 more source

Mg(SPh)2 as a Catalyst for Efficient Photocatalytic Alkylation Reactions of Active Methylene Compounds with Nonactivated Alkenes

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract Mg(SPh)2 has been found to be a highly active catalyst in photocatalytic alkylation reactions of active methylene compounds with nonactivated alkenes. The desired reactions proceeded smoothly to afford the corresponding alkylated products in high yields with low catalyst loadings (0.2–0.3 mol%). This protocol is applicable to a continuous‐flow
Yasuhiro Yamashita, Tomoya Hisada, Yuki Sato, Shū Kobayashi   +3 more
wiley   +1 more source

Development of the Integrated System for Cleaning Small Tanks for Petroleum Products and Liquid Chemicals with Jet Cleaning Units and for Waste Water Disposal

, 1974
Kenji Watanabe, Kenzo Fujisawa
openalex   +2 more sources

Reform of the Fiscal and Subsidy Regime for the Petroleum Sector (Based on a Report Commissioned by the Petroleum Federation of India) [PDF]

Reform of the oil sector is long overdue. The problems in the sector emanate from the structure of central taxes and the system of subsidisation through prices.
Barua, Samir K., Morris, Sebastian, Varma, Jayanth R.   +2 more
core  

Tunable Preparation of β‐Substituted Alkenoate Esters via Radical Alkenylation of C(sp3)–H Bonds with Allenoates

Advanced Synthesis &Catalysis, EarlyView.
Abstract A photocatalytic strategy for the radical alkenylation of aliphatic C(sp3)–H bonds with 2,3‐allenoate esters is described. The protocol takes place upon irradiation of the reaction mixture in the presence of the decatungstate anion, which triggers C−H cleavage in the chosen aliphatic substrates.
Alexandra Jorea, Roberto Chessa, Davide Ravelli   +2 more
wiley   +1 more source

Mitigating product inhibition in 2'-hydroxybiphenyl-2-sulfinate desulfinase (DszB) with synthetic glycosylation. [PDF]

Protein Sci
Liang J, Zheng Y, Vaissier Welborn V.
europepmc   +1 more source

Removal of nitrogenous compounds from petroleum processing products using chlorosilylated silica gel

, 1980
M A Poirier, A E George
openalex   +1 more source

Visible Light‐Promoted Esterification of Carboxylic Acids via Photoacid Generation Catalysis

Advanced Synthesis &Catalysis, EarlyView.
A novel, environmentally friendly photochemical method for the esterification of carboxylic acids with alcohols using arylazo sulfones as photoacid generators was developed. This approach avoids traditional acidic catalysts, purification did not require chromatography and the method proved effective under continuous flow conditions for enhanced ...
Valentina Benazzi, Periklis X. Kolagkis, Lorenzo di Terlizzi, Eirini M. Galathri, Olga G. Mountanea, Maurizio Fagnoni, Stefano Protti, Christoforos G. Kokotos   +7 more
wiley   +1 more source